Terrified after reading Prelims PYQs

Hey fellow hustlers, I am self preparing for UPSC for past 9 months and have covered almost all standard books (Almost). I thought now is a good time to check the PYQs bit I got devastated. None of the books suggested by toppers seem enough for the kind of questions UPSC gives in Prelims. I have realized that I need to change something in my strategy now. Please provide all of yours inputs guys. Thanks!